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-rw-r--r--mesalib/src/glsl/ir_function.cpp453
1 files changed, 226 insertions, 227 deletions
diff --git a/mesalib/src/glsl/ir_function.cpp b/mesalib/src/glsl/ir_function.cpp
index dfdec144b..4997570d0 100644
--- a/mesalib/src/glsl/ir_function.cpp
+++ b/mesalib/src/glsl/ir_function.cpp
@@ -1,227 +1,226 @@
-/*
- * Copyright © 2010 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-
-#include "glsl_types.h"
-#include "ir.h"
-
-int
-type_compare(const glsl_type *a, const glsl_type *b)
-{
- /* If the types are the same, they trivially match.
- */
- if (a == b)
- return 0;
-
- switch (a->base_type) {
- case GLSL_TYPE_UINT:
- case GLSL_TYPE_INT:
- case GLSL_TYPE_BOOL:
- /* There is no implicit conversion to or from integer types or bool.
- */
- if ((a->is_integer() != b->is_integer())
- || (a->is_boolean() != b->is_boolean()))
- return -1;
-
- /* FALLTHROUGH */
-
- case GLSL_TYPE_FLOAT:
- if ((a->vector_elements != b->vector_elements)
- || (a->matrix_columns != b->matrix_columns))
- return -1;
-
- return 1;
-
- case GLSL_TYPE_SAMPLER:
- case GLSL_TYPE_STRUCT:
- /* Samplers and structures must match exactly.
- */
- return -1;
-
- case GLSL_TYPE_ARRAY:
- if ((b->base_type != GLSL_TYPE_ARRAY)
- || (a->length != b->length))
- return -1;
-
- /* From GLSL 1.50 spec, page 27 (page 33 of the PDF):
- * "There are no implicit array or structure conversions."
- *
- * If the comparison of the array element types detects that a conversion
- * would be required, the array types do not match.
- */
- return (type_compare(a->fields.array, b->fields.array) == 0) ? 0 : -1;
-
- case GLSL_TYPE_FUNCTION:
- case GLSL_TYPE_VOID:
- case GLSL_TYPE_ERROR:
- default:
- /* These are all error conditions. It is invalid for a parameter to
- * a function to be declared as error, void, or a function.
- */
- return -1;
- }
-
- /* This point should be unreachable.
- */
- assert(0);
-}
-
-
-static int
-parameter_lists_match(const exec_list *list_a, const exec_list *list_b)
-{
- const exec_node *node_a = list_a->head;
- const exec_node *node_b = list_b->head;
- int total_score = 0;
-
- for (/* empty */
- ; !node_a->is_tail_sentinel()
- ; node_a = node_a->next, node_b = node_b->next) {
- /* If all of the parameters from the other parameter list have been
- * exhausted, the lists have different length and, by definition,
- * do not match.
- */
- if (node_b->is_tail_sentinel())
- return -1;
-
-
- const ir_variable *const param = (ir_variable *) node_a;
- const ir_instruction *const actual = (ir_instruction *) node_b;
-
- /* Determine whether or not the types match. If the types are an
- * exact match, the match score is zero. If the types don't match
- * but the actual parameter can be coerced to the type of the declared
- * parameter, the match score is one.
- */
- int score;
- switch ((enum ir_variable_mode)(param->mode)) {
- case ir_var_auto:
- case ir_var_uniform:
- case ir_var_temporary:
- /* These are all error conditions. It is invalid for a parameter to
- * a function to be declared as auto (not in, out, or inout) or
- * as uniform.
- */
- assert(0);
- return -1;
-
- case ir_var_in:
- score = type_compare(param->type, actual->type);
- break;
-
- case ir_var_out:
- score = type_compare(actual->type, param->type);
- break;
-
- case ir_var_inout:
- /* Since there are no bi-directional automatic conversions (e.g.,
- * there is int -> float but no float -> int), inout parameters must
- * be exact matches.
- */
- score = (type_compare(actual->type, param->type) == 0) ? 0 : -1;
- break;
-
- default:
- assert(false);
- }
-
- if (score < 0)
- return -1;
-
- total_score += score;
- }
-
- /* If all of the parameters from the other parameter list have been
- * exhausted, the lists have different length and, by definition, do not
- * match.
- */
- if (!node_b->is_tail_sentinel())
- return -1;
-
- return total_score;
-}
-
-
-ir_function_signature *
-ir_function::matching_signature(const exec_list *actual_parameters)
-{
- ir_function_signature *match = NULL;
-
- foreach_iter(exec_list_iterator, iter, signatures) {
- ir_function_signature *const sig =
- (ir_function_signature *) iter.get();
-
- const int score = parameter_lists_match(& sig->parameters,
- actual_parameters);
-
- if (score == 0)
- return sig;
-
- if (score > 0) {
- if (match != NULL)
- return NULL;
-
- match = sig;
- }
- }
-
- return match;
-}
-
-
-static bool
-parameter_lists_match_exact(const exec_list *list_a, const exec_list *list_b)
-{
- const exec_node *node_a = list_a->head;
- const exec_node *node_b = list_b->head;
-
- for (/* empty */
- ; !node_a->is_tail_sentinel() && !node_b->is_tail_sentinel()
- ; node_a = node_a->next, node_b = node_b->next) {
- ir_variable *a = (ir_variable *) node_a;
- ir_variable *b = (ir_variable *) node_b;
-
- /* If the types of the parameters do not match, the parameters lists
- * are different.
- */
- if (a->type != b->type)
- return false;
- }
-
- /* Unless both lists are exhausted, they differ in length and, by
- * definition, do not match.
- */
- return (node_a->is_tail_sentinel() == node_b->is_tail_sentinel());
-}
-
-ir_function_signature *
-ir_function::exact_matching_signature(const exec_list *actual_parameters)
-{
- foreach_iter(exec_list_iterator, iter, signatures) {
- ir_function_signature *const sig =
- (ir_function_signature *) iter.get();
-
- if (parameter_lists_match_exact(&sig->parameters, actual_parameters))
- return sig;
- }
- return NULL;
-}
+/*
+ * Copyright © 2010 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "glsl_types.h"
+#include "ir.h"
+
+int
+type_compare(const glsl_type *a, const glsl_type *b)
+{
+ /* If the types are the same, they trivially match.
+ */
+ if (a == b)
+ return 0;
+
+ switch (a->base_type) {
+ case GLSL_TYPE_UINT:
+ case GLSL_TYPE_INT:
+ case GLSL_TYPE_BOOL:
+ /* There is no implicit conversion to or from integer types or bool.
+ */
+ if ((a->is_integer() != b->is_integer())
+ || (a->is_boolean() != b->is_boolean()))
+ return -1;
+
+ /* FALLTHROUGH */
+
+ case GLSL_TYPE_FLOAT:
+ if ((a->vector_elements != b->vector_elements)
+ || (a->matrix_columns != b->matrix_columns))
+ return -1;
+
+ return 1;
+
+ case GLSL_TYPE_SAMPLER:
+ case GLSL_TYPE_STRUCT:
+ /* Samplers and structures must match exactly.
+ */
+ return -1;
+
+ case GLSL_TYPE_ARRAY:
+ if ((b->base_type != GLSL_TYPE_ARRAY)
+ || (a->length != b->length))
+ return -1;
+
+ /* From GLSL 1.50 spec, page 27 (page 33 of the PDF):
+ * "There are no implicit array or structure conversions."
+ *
+ * If the comparison of the array element types detects that a conversion
+ * would be required, the array types do not match.
+ */
+ return (type_compare(a->fields.array, b->fields.array) == 0) ? 0 : -1;
+
+ case GLSL_TYPE_VOID:
+ case GLSL_TYPE_ERROR:
+ default:
+ /* These are all error conditions. It is invalid for a parameter to
+ * a function to be declared as error, void, or a function.
+ */
+ return -1;
+ }
+
+ /* This point should be unreachable.
+ */
+ assert(0);
+}
+
+
+static int
+parameter_lists_match(const exec_list *list_a, const exec_list *list_b)
+{
+ const exec_node *node_a = list_a->head;
+ const exec_node *node_b = list_b->head;
+ int total_score = 0;
+
+ for (/* empty */
+ ; !node_a->is_tail_sentinel()
+ ; node_a = node_a->next, node_b = node_b->next) {
+ /* If all of the parameters from the other parameter list have been
+ * exhausted, the lists have different length and, by definition,
+ * do not match.
+ */
+ if (node_b->is_tail_sentinel())
+ return -1;
+
+
+ const ir_variable *const param = (ir_variable *) node_a;
+ const ir_instruction *const actual = (ir_instruction *) node_b;
+
+ /* Determine whether or not the types match. If the types are an
+ * exact match, the match score is zero. If the types don't match
+ * but the actual parameter can be coerced to the type of the declared
+ * parameter, the match score is one.
+ */
+ int score;
+ switch ((enum ir_variable_mode)(param->mode)) {
+ case ir_var_auto:
+ case ir_var_uniform:
+ case ir_var_temporary:
+ /* These are all error conditions. It is invalid for a parameter to
+ * a function to be declared as auto (not in, out, or inout) or
+ * as uniform.
+ */
+ assert(0);
+ return -1;
+
+ case ir_var_in:
+ score = type_compare(param->type, actual->type);
+ break;
+
+ case ir_var_out:
+ score = type_compare(actual->type, param->type);
+ break;
+
+ case ir_var_inout:
+ /* Since there are no bi-directional automatic conversions (e.g.,
+ * there is int -> float but no float -> int), inout parameters must
+ * be exact matches.
+ */
+ score = (type_compare(actual->type, param->type) == 0) ? 0 : -1;
+ break;
+
+ default:
+ assert(false);
+ }
+
+ if (score < 0)
+ return -1;
+
+ total_score += score;
+ }
+
+ /* If all of the parameters from the other parameter list have been
+ * exhausted, the lists have different length and, by definition, do not
+ * match.
+ */
+ if (!node_b->is_tail_sentinel())
+ return -1;
+
+ return total_score;
+}
+
+
+ir_function_signature *
+ir_function::matching_signature(const exec_list *actual_parameters)
+{
+ ir_function_signature *match = NULL;
+
+ foreach_iter(exec_list_iterator, iter, signatures) {
+ ir_function_signature *const sig =
+ (ir_function_signature *) iter.get();
+
+ const int score = parameter_lists_match(& sig->parameters,
+ actual_parameters);
+
+ if (score == 0)
+ return sig;
+
+ if (score > 0) {
+ if (match != NULL)
+ return NULL;
+
+ match = sig;
+ }
+ }
+
+ return match;
+}
+
+
+static bool
+parameter_lists_match_exact(const exec_list *list_a, const exec_list *list_b)
+{
+ const exec_node *node_a = list_a->head;
+ const exec_node *node_b = list_b->head;
+
+ for (/* empty */
+ ; !node_a->is_tail_sentinel() && !node_b->is_tail_sentinel()
+ ; node_a = node_a->next, node_b = node_b->next) {
+ ir_variable *a = (ir_variable *) node_a;
+ ir_variable *b = (ir_variable *) node_b;
+
+ /* If the types of the parameters do not match, the parameters lists
+ * are different.
+ */
+ if (a->type != b->type)
+ return false;
+ }
+
+ /* Unless both lists are exhausted, they differ in length and, by
+ * definition, do not match.
+ */
+ return (node_a->is_tail_sentinel() == node_b->is_tail_sentinel());
+}
+
+ir_function_signature *
+ir_function::exact_matching_signature(const exec_list *actual_parameters)
+{
+ foreach_iter(exec_list_iterator, iter, signatures) {
+ ir_function_signature *const sig =
+ (ir_function_signature *) iter.get();
+
+ if (parameter_lists_match_exact(&sig->parameters, actual_parameters))
+ return sig;
+ }
+ return NULL;
+}